Francis herbert wenham



(No Model.) l I F. E. WENHAM.

' GAS LAMP.

N0- 355,629. KK Ptented. Jan. 4, 1887,

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EEANcIs HERBERT WENHAM, or THE BEACON, GoLDsWoRrH, WONING,

` COUNTY or suEEEY, ENGLAND.

GAsLAMP.

SPECIFICATION forming part of Letters Patent No. 355,629, eared January 4, 1887.

Application filed December 3, 1886. Serial No. 220,583. (No model.) Patented in England February 3, 1885, No. 1,514, and August 11, 1886, No. 10,279; in Victoria May 4, 1885, No. 4,049; in New South Wales July 13, 1885, No. 6,757; in Russia October 28, 1885; in South Australia December 7, 1885, No. G29; in Queensland April l20, 1886, No. 72; in Spain June 10, 1886, No. 5,554, and in Denmark November 1, 1886, No. 814.

.To allwhom, z5 may concern:

Be it known that I, FRANCIS HERBERr WEN- HAM, a subject of the Queen of Great Britain and Ireland, and residing at The Beacon, Goldsworth, Woking, in the county of Surrey, England, have invented certain new and useful Improvements in Gas-Lamps, (for which I have obtained patents in the following countries: Great Britain, dated February 3, 1885, No. 1,514; Victoria, dated May 4, 1885, No. 4,049; New South Wales, dated July 13, 1885, No. 6,757; South Australia, dated December 7, 1885, No. 629; Queensland, dated April 20, 1886, No. 72; Spain, dated .Tune l0, 1886, No. 5,5511; Denmark, dated November 1, 1886, No. 814; and have made applications in Russia 0n the 28th of Gctober, 1885, aiid Great Britain on the 11th of August, 1886, No. 10,279,) of which the following is a specification.

My invention relates to the class of gas- ]amps wherein the air supplied to the lamp is heated in its passage to the iiame by means of an air heating chamber placed above the burner, the flame being inclosed in a glass, and the air-inlets and the chimney being so arranged that a cup or saucer shaped flame is obtained. A

The objects of my present invention are principally to provide efficient -lamps of simple construction, and `wherein the orifices for the escape of gas are not liable to become clogged by carbonaceous matter.

Figure I of the accompanying drawings is a vertical section Yof a lamp constructed according to my invention; and Figs. 1I and IIL show modifications of the lamp, as hereinafter described.

In Fig. I, A is an inner chamber situated in the center of the lamp casing B, the tubes?) leading air from outside the lamp to the chamber A. rlhe lower end of the inner chamber, A, intowhich the air for supplying the inside I of the iame is received, is covered with a perforated plate or gauze, h, either flat, as in Figs. I and II, or preferably of a cup or dished form, as shown in Fig. III.

When the gas is lighted, the flame spreads outward under the perforated plate or gauze li. When the glass E is closed below it, the draft through the heating-chamber A brings a current of heat-ed air from above, as indicated by the arrows, so as to depress the flame, the air entering the lamp by passing in beneath the curtain C, and then through the horizontal tubes b into the chamber A, and thence through the gauze h, or its equivalent, to the flame. The curtain C protects the lamp from direct air-currents. Air is admitted through orices If* in the cover b2 of the lamp, as shown by the arrows, or at other suitable parts, in suflicient quantity tok produce complete combustion.

The burner G, which is supplied by the pipe F, is closed at the top, and has holes around its periphery.

The chamber A has gauze or its equivalent both at the top at i', and at the bottom at h,

in Figs'. I and II. There is a space. between the said gauze or its equivalent and the top of the burner, which, as before mentioned,- has orifices around its periphery or sides, and is closed at top, and there is also preferably an opening or increased air-passage in the central part of the lower gauze, 7L, or its equivalent, for the freer passage of air at this part. The air forV vthe supply of the vouter side of the llame is taken through the openings b3. E is the inclosing-glass, and the exit for the products of combustion is between the chamber as shown. The gauze or its equivalent may be situated in any suitable position in or inv connection with the airchamber,and in place of gauze I may use perforated or divided plates or rings ot` metal,\ or equivalent means of breaking up the air and dividing it into small streams for properly distributing it.

As shown in Fig. III, the gauze his replaced by a plate, 7i?, having a central opening or perforation.

It will be seen that in this lamp by the simple arrangements of parts, as shown, a regulated supply of heated air is obtained, and that a cup or saucer shaped Iiame is produced Without the use of a reflecting dame-plate above the flame, or a disk or button beneath it; and, further, that as thev gas is not highly heated before it escapes at the burner the gasoutlet orifices are not liable to be clogged by carbonaceous particles depositing in them.

In the arrangement, Fig. I, the upper part of the lamp can be lifted bodily off from the glass and burner beneath for lighting or other purpose, while the glass can be slid oli' from the supply-pipe and burner.

I claim as my invention# 1. In a gas-lamp, the combination of a flameinclosing glass, a lamp-casing, an air-heating chamber having inlets for the admission of air, a gauze or plate having perforations over its entire surface, and a burner closed at the top, and having openings around its periphery and placed directly below said air-heating chamber, with an entirely free space beto this specication in the presence of two subv3,0

seribing witnesses.

FRANCIS HERBERT W'EN H AM. lVitnesses: CHAs. MrLLs,

i GHAs. JAs. JoNEs.

Both of 47 Lncolns Inn Fields, London. 

